Axino dark matter from Q-balls in Affleck-Dine baryogenesis and the ${\Omega }_b-{\Omega }_{DM}$ coincidence problem

Abstract

We show that the ${\Omega }_b-{\Omega }_{DM}$ coincidence can naturally be explained in a framework where axino cold dark matter is predominantly produced in non-thermal processes involving decays of Q-balls formed in Affleck-Dinebaryogenesis. In this approach the similarity between ${\Omega }_b$ and ${\Omega }_{DM}$ is a direct consequence of the (sub-)GeV scale of the mass of the axino.

4 pages, no figure, final PRL version

References in corpus (1)

• Towards the robustness of the Affleck-Dine baryogenesis

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